(19)
(11) EP 1 566 934 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.11.2006 Bulletin 2006/46

(43) Date of publication A2:
24.08.2005 Bulletin 2005/34

(21) Application number: 05003404.0

(22) Date of filing: 17.02.2005
(51) International Patent Classification (IPC): 
H04L 27/26(2006.01)
 H04B 7/06(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR LV MK YU

(30) Priority: 19.02.2004 JP 2004042950

(71) Applicants:
  • ALPS ELECTRIC CO., LTD.
    Tokyo 145-8501 (JP)
  • MegaChips LSI Solutions Inc.
    Osaka-shi, Osaka 532-0003 (JP)

(72) Inventors:
  • Oyama, Toru, Alps Electric Co., Ltd.
    Tokyo 145-8501 (JP)
  • Otaki, Yukio, Alps Electric Co., Ltd.
    Tokyo 145-8501 (JP)
  • Ishio, Koji, MegaChips LSI Solutions Inc.
    Osaka-shi Osaka 532-0003 (JP)
  • Chen, Handa, MegaChips LSI Solutions Inc.
    Osaka-shi Osaka 532-0003 (JP)

(74) Representative: Klunker . Schmitt-Nilson . Hirsch 
Winzererstrasse 106
80797 München
80797 München (DE)

   


(54) OFDM diversity receiver


(57) An OFDM diversity receiver includes a first multi-stage semiconductor demodulating circuit including a plurality of circuit stages, each circuit stage including a fast Fourier transformer and signal-combining units, and a second single-stage semiconductor demodulating circuit including a fast Fourier transformer and a forward error-correcting unit. These circuit stages and the second single-stage semiconductor demodulating circuit are connected to respective tuning units. Baseband signals derived from received signals from the tuning units are supplied to the respective fast Fourier transformers that transform the baseband signals using the fast Fourier transformation algorithm. The signal-combining units in these circuit stages combine the transformed signals. The combined transformed signals are supplied to the forward error-correcting unit that corrects any errors of the combined transformed signals and outputs bit strings.







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